Receiver rugs-blown primers

[trisurvivor]

Evening Gents,

Anyone run receiver rugs? If so what are your thoughts? For those that don't know what they are:

The reason I ask is that I had a blown primer yesterday in my POF 556 rifle. I had fired about 300 since I got it. I am developing a load using AR-Comp at 22.0grains, Nosler CC 69grain bullets, fed brass, and cci br-4s. primer pockets felt loose in some. It shot awesome in 3 different trips to the range, but this time it blew a primer half way through the first mag. Screwed up everything. Primer finally got lodged under trigger base. I thought it was a massive failure, but upon further inspection at hope, it was a simple fix. Really pissed me off. Anyone else experience this?

 

[tomcat mv]

Re: Receiver rugs-blown primers

I too have been curious about these "rugs". Haven't had a problem likt trisurvivor's but just wondered if they are worth the trouble to keep the trigger group clean instead of just greasing the sidewalls.

 

[HPLLC]

Re: Receiver rugs-blown primers

Strange looking component. I've been reading about a lot of loose primers lately. I've never seen that happen, but it seems like it is a common enough problem lately.

 

[superjc]

Re: Receiver rugs-blown primers

Happened to me once at the range in 2001 in Fl. shooting PMC bronze in an Eagle (Armalite) AR-15... trigger completely locked up, took it apart and a primer was lodged underneath moving parts. My thought was "holy crap what a horrible thing that would be to have happen to a soldier in combat". Don't know how common it is but it CAN happen.

 

[shootist2004]

Re: Receiver rugs-blown primers

who sells them?

 

[trisurvivor]

Re: Receiver rugs-blown primers

I found them at midway.com

 

[RugerSlinger]

Re: Receiver rugs-blown primers

This is why most military ammo has crimped primer pockets.

 

[HPLLC]

Re: Receiver rugs-blown primers



I wonder if the "rugs" keep malfs from happening with normal hand loaded primers? I mean would the gun run with a primer rattling around in the lower then?

 

[trisurvivor]

Re: Receiver rugs-blown primers

That is what I am wondering. I am using reloads and never had this problem until now. I was hoping someone had used it and could comment on. The brass I am using had crimped primers before reloading them.

 

[Ned Christiansen]

Re: Receiver rugs-blown primers

Primers fall out when the case head has expanded due to high pressure-- it might have happened before you ever reloaded the case.

I'd say if the source of the case was you, and you know that when it was fired as a factory load, that it was a .223-spec round and not a 5.56 one, then I suspect your current load is on the edge of too hot.

I have been present for many a "popped" primer. In my case it's usually a guy firing 5.56-spec ammo in a commercial-spec, .223 chamber. This combo can cause pressures approaching proof load levels.

For the reloader who doesn't know the provenence of his brass, who's to say that some of the brass didn't come from the above combo, and has loose primer pockets? I have measured the primer pockets of a few rounds that popped primers, and they were .005 oversized. No dang wonder they fell out!

 

[shootist2004]

Re: Receiver rugs-blown primers

they only sell DPMS ar-15 rugs. I need one for POF ar-10....

 

[trisurvivor]

Re: Receiver rugs-blown primers

They have a black one that is slightly different.

 

[trisurvivor]

Re: Receiver rugs-blown primers

I have a 556 chamber, running 22.0 grains of arcomp and Max is 23.5grains. Primer pockets seem loose.